Nasal Light-Shielding Structure for Head-Mounted Displays
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Solution Overview
Problem
Head-mounted devices face challenges in effectively blocking environmental light from entering the interior, particularly around the nasal region, due to varying user facial topologies, which can interfere with the viewing experience.
Innovation Solution
A nasal-region-mounted light-shielding structure comprising rigid, flexible, and fabric members that conform to the nasal region, with flexible members deforming to accommodate different users and a fabric cover tented over the underlying structure to provide effective light shielding while maintaining comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigid light-shielding structure is used, then light blocking effectiveness is improved, but adaptability to different user nasal topologies deteriorates
Solution Approach 1:
The light-shielding structure is divided into multiple segments including a rigid portion and a flexible portion. The rigid portion provides effective light blocking, while the flexible portion adapts to different nasal topologies. This segmentation allows each part to perform its specialized function without compromise.
Solution Approach 2:
Different portions of the light-shielding structure have different mechanical properties tailored to their specific functions. The rigid portion is designed with high stiffness for light blocking, while the flexible portion is designed with compliance for adaptation. This local differentiation of material properties resolves the contradiction between rigidity and adaptability.
2Adaptability or versatility
If a flexible light-shielding structure is used, then adaptability to different users is improved, but light blocking effectiveness deteriorates
Solution Approach 1:
The structure is segmented into rigid and flexible portions that work together. The flexible portion ensures adaptation to different users, while the rigid portion maintains light blocking effectiveness. Neither portion compromises the other's function.
Solution Approach 2:
The light-shielding structure combines materials with different mechanical properties - rigid materials for light blocking and flexible materials for adaptation. This composite approach allows the structure to simultaneously achieve both adaptability and light blocking effectiveness.
3Object-affected harmful factors
If the light-shielding structure is made rigid to block light, then light blocking is improved, but comfort and fit deteriorate
Solution Approach 1:
The structure is divided into rigid and flexible portions. The rigid portion blocks light effectively, while the flexible portion provides comfort and adaptability to the user's nasal region. This segmentation resolves the contradiction between light blocking and comfort.
Solution Approach 2:
Different regions of the light-shielding structure have different mechanical properties - rigid where light blocking is critical, flexible where comfort and adaptation are critical. This local differentiation simultaneously achieves light blocking effectiveness and user comfort.
4Ease of operation
If the light-shielding structure is made flexible to accommodate users, then comfort is improved, but light blocking effectiveness deteriorates
Solution Approach 1:
The structure is segmented into flexible portions for comfort and rigid portions for light blocking. Each portion performs its designated function without compromising the other, resolving the contradiction between comfort and light blocking effectiveness.
Solution Approach 2:
The light-shielding structure uses composite construction combining flexible materials for comfort and rigid materials for light blocking. This composite approach allows simultaneous achievement of both comfort and effective light blocking.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively blocks environmental light, enhancing the viewing experience by conforming to individual nasal topologies and providing a comfortable fit, thereby improving the usability of head-mounted devices.
Implementation Method 1
The flexible members may deform differently to accommodate nasal region differences between different users while still closing gaps around the nasal regions
Implementation Method 2
the light-shielding structure may be configured to block environmental light from entering an interior of the head-mounted device
Data Source
AI summary
A head-mounted device may have a main housing containing displays that display images to eye boxes for a user when the head-mounted device is worn by the user. The head-mounted device may include a light-shielding structure coupled to the main housing and configured to rest on the nasal region of the user. The light-shielding structure may include rigid members, flexible members, and/or fabric members. The light-shielding structure may conform to the facial features of the user around the nasal region to block environmental light from entering the eye boxes when the head-mounted device is worn by the user.